Antislipping attachment for gang-planks



E. L. MILES. ANTISLIPPING ATTACHMENT FOR GANG PLANKS.

APPLICATION FILED JUNE 30. IQTS.

"1 ,329,057. Patented Jan. 27,1920.

TTEE) STATES PATENT OFFICE.

EDWARD L. MILES, 0F STEVENS PGINT, WISCONSIN, ASSIGNOR OF ONE-HALF TOLEVI E. GENETT, OF STEVENS FGINT, VJISCONSIN.

ANTISLIPPING iiT'lACEE-t";

Application filed June 30, 1919.

To all whom it may concern:

it known that I, Err-erase L. MiLEs, a citizen of the United States,residing at Stevens Point, in the county of Portage, State of Wisconsin,have invented certain new and useful Improvements in AntislippingAttachments for Gang-Planks; and I do hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

This invention relates to new and useful improvements in gang planks andparticularly to attachments therefor.

The principal object of the present invention is LO provide a novel andimproved device for attachment to a gang plank which will prevent thegang plank from slipping while in use.

Another object is to provide a novel and improved anti-slippingattachment for a gang plank which will also yield so as to permit thegang plank to lower and thus obviate a jolt to the truck as it passesonto or off the gang plank.

Other objects and advantages will be apparent from the followingdescription when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is a side elevation of a gang plank equipped with my improvedantislipping device.

Fig. 2 is an enlarged vertical sectional view taken on the line 22 ofFig. 1, through the anti-slipping device, the said device being innormal position.

Fig. 3 is a similar sectional view showing the gang plank depressedunder the load of a truck.

Fig. 4 is a top plan view of one corner of the gang plank showing themanner in which the anti-slipping device is secured thereto.

Referring particularly to the accompanying drawing, 10 represents aplank of the type in general use and which is formed of metal. This gangis usually formed of a single sheet of metal about three-eighths of aninch thick with one end turned down, as shown at 11, and the other endtapered or beveled to a thickness of about one-eighth of an inch, asshown at 12. The beveled end 11 Specification of Letters Patent.

ENT FOB GANG-PLANKS.

Patented Jan. 27, 1920.

Serial No. 307,675.

is placed on the floor or platform of a station or warehouse while theend 12 is rested on the floor of a car, within the doorway thereof. Theloading and unloading trucks are run up and down this gang intransferring the freight to and from the car. This gang is liable toslip causing injury to the operators and damage to the freight. It isthe particular object of this invention to provide a novel and improveddevice which is adapted to be secured to each of the four corners of thegang to prevent this slipping, thereby protectin the operators and thefreight.

The attachment for the gang comprises a casting of steel or other hardmetal 13, which includes an attaching flange 14: secured to the edge ofthe gang by rivets 15, and the vertical tubular member 16, the latterportion being disposed outwardly of the edge of the gang. Longitudinallythrough the member 16 is a bore 17 having a shoulder 18 at the upper endwhich causes a reduc tion in the bore, as shown at 19. Disposed withinthis bore is a pin 20 having its lower end protruding from the lower endof the bore and formed with a point 21. Above this point is a shoulder22, the upper portion of the pin being thus reduced to fit into theupper portion of the bore, while the lower portion fits in the lower, orlarger, portion of the bore. A coil spring 23 en circles the reducedportion of the pin and bears with its opposite ends against the shoulder22 and against the shoulder 18, with the result that the pin is normallyforced downwardly so that its point projects through the lower end ofthe bore for biting engagement in the platform or the floor of the car.Through the upper end of the reduced end of the pin, above the upper endof the member 16, is a pin 24 for holding the pin 16 against completemovement downwardly through the bore of the member 16.

There is one of the devices, above de scribed, secured to each of thecorners of the those at one end being secured inwardly of the bend ofthe downturned end 11.

There is thus provided a novel and improved device which can be attachedto any of t .e metal gang planks now in use, without modificationsthereto, and Which Will effectively prevent slipping of the gang plank.

What is claimed is: The combination with a metal gang plank, 5 oftubular members mounted on the corners of the gang plank, slidablepointed pins disposed in the tubular members, resilient means Within thetubular members and engaging the tubular members and pins for normallyurging the pins outwardly, and 10 means for limiting the outwardmovement of the pins.

In testimony whereof I afiiX my signature in the presence of tWoWitnesses.

EDWARD L. MILES. Witnesses:

A. E. BoURN, DELL KING.

